From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760055AbZEFQHn (ORCPT ); Wed, 6 May 2009 12:07:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752911AbZEFQHd (ORCPT ); Wed, 6 May 2009 12:07:33 -0400 Received: from sous-sol.org ([216.99.217.87]:59869 "EHLO sequoia.sous-sol.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753184AbZEFQHc (ORCPT ); Wed, 6 May 2009 12:07:32 -0400 Date: Wed, 6 May 2009 09:07:12 -0700 From: Chris Wright To: Gregory Haskins Cc: Chris Wright , Gregory Haskins , Avi Kivity , linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: Re: [RFC PATCH 0/3] generic hypercall support Message-ID: <20090506160712.GW3036@sequoia.sous-sol.org> References: <20090505132005.19891.78436.stgit@dev.haskins.net> <4A0040C0.1080102@redhat.com> <4A0041BA.6060106@novell.com> <4A004676.4050604@redhat.com> <4A0049CD.3080003@gmail.com> <20090505231718.GT3036@sequoia.sous-sol.org> <4A010927.6020207@novell.com> <20090506072212.GV3036@sequoia.sous-sol.org> <4A018DF2.6010301@novell.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4A018DF2.6010301@novell.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Gregory Haskins (ghaskins@novell.com) wrote: > Chris Wright wrote: > > VF drivers can also have this issue (and typically use mmio). > > I at least have a better idea what your proposal is, thanks for > > explanation. Are you able to demonstrate concrete benefit with it yet > > (improved latency numbers for example)? > > I had a test-harness/numbers for this kind of thing, but its a bit > crufty since its from ~1.5 years ago. I will dig it up, update it, and > generate/post new numbers. That would be useful, because I keep coming back to pio and shared page(s) when think of why not to do this. Seems I'm not alone in that. thanks, -chris